From: Aurelien Jarno <aurelien@aurel32.net>
To: Florian Weimer <fweimer@redhat.com>
Cc: GNU C Library <libc-alpha@sourceware.org>
Subject: Re: SIGBUS failure for misc/tst-bz21269 on i386
Date: Tue, 27 Mar 2018 21:47:00 -0000 [thread overview]
Message-ID: <20180327214707.GA4207@aurel32.net> (raw)
In-Reply-To: <bd3a427a-9c46-bad1-2cb6-d31b228d2fbf@redhat.com>
On 2018-03-14 14:34, Florian Weimer wrote:
> Has anyone else seen this failure?
I do see the issue. I can reproduce it on both Debian and Fedora.
> I saw it with this kernel:
>
> Linux buildvm-09.phx2.fedoraproject.org 4.15.3-300.fc27.x86_64 #1 SMP Tue
> Feb 13 17:02:01 UTC 2018 i686 i686 i386 GNU/Linux
I am using 64-bit kernels:
Linux fedora.local 4.13.12-300.fc27.x86_64 #1 SMP Wed Nov 8 16:38:01 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Linux ohm 4.15.0-1-amd64 #1 SMP Debian 4.15.4-1 (2018-02-18) x86_64 GNU/Linux
> The CPU has AVX2, but not AVX-512. I couldn't reproduce it on another AVX2
My CPU is a Core i3-5010U, so it has AVX2, but not AVX-512.
> machine. The failure happened in the Fedora build environment, so I don't
> have a coredump.
Here is the coredump that I can get:
Thread 1 "tst-bz21269" received signal SIGBUS, Bus error.
0x565564a0 in do_test () at ../sysdeps/unix/sysv/linux/i386/tst-bz21269.c:217
217 while (atomic_load (&ftx) != 0)
(gdb) bt
#0 0x565564a0 in do_test () at ../sysdeps/unix/sysv/linux/i386/tst-bz21269.c:217
#1 0x56556bc2 in support_test_main (argc=<optimized out>, argv=0xffffd518, config=0xffffd424) at support_test_main.c:321
#2 0x56556061 in main (argc=2, argv=0xffffd514) at ../support/test-driver.c:164
(gdb) print &ftx
$1 = (atomic_uint *) 0x5655a0e0 <ftx>
(gdb) print ftx
$2 = 0
Aurelien
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
aurelien@aurel32.net http://www.aurel32.net
next prev parent reply other threads:[~2018-03-27 21:47 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-14 13:35 Florian Weimer
2018-03-14 13:44 ` H.J. Lu
2018-03-14 16:47 ` Adhemerval Zanella
2018-03-27 21:47 ` Aurelien Jarno [this message]
2018-03-27 21:58 ` H.J. Lu
2018-03-28 6:47 ` Aurelien Jarno
2018-03-28 8:01 ` Florian Weimer
2018-03-28 17:37 ` Aurelien Jarno
2018-03-28 17:47 ` Florian Weimer
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